ASLO Aquatic Sciences Meeting 2009

01/25/2009 11:00
01/30/2009 11:00

ASLO Aquatic Sciences Meeting 2009
"A Cruise Through Nice Waters"
25-30 January 2009, Nice, France
Contributions from the IR-SCOR Working Group listed below

Session co-sponsored by InterRidge:
032. From molecules to organisms: Chemoautotrophic pathways and mechanisms of energy transfer in extreme marine environments

Organizers: Nadine Le Bris, nlebris[at]; Michail Yakimov, michail.yakimov[at]; Stefan Sievert, ssievert[at]
Extreme environments in the deep-sea, such as hydrothermal vents, hydrocarbon seeps, brine lakes or massive organic falls are characterised by steep chemical gradients at the interface between reducing fluids and seawater. Lower pH, high concentration of toxic gases (e.g., H2S, CO2) and dissolved metals constraint the ability of organisms to live at these interfaces. These environments however harbour some of the most productive marine communities. Chemolithoautotrophy and symbioses have been identified as key processes sustaining high biomass production in some particular contexts, but much remains to be known about the mechanisms of energy transfer from molecules to organisms in a wide range of oceanic settings and their role in ocean biogeochemistry. The aim of this session is to bring together microbiology, biochemistry, geochemistry and symbiosis biology to provide a more comprehensive view of the diverse mechanisms sustaining high biological activity at redox chemical interfaces in the deep ocean. Availability of chemical substrates, diversity of pathways related to carbon fixation and energy generation, metabolic preferences of prokaryotes, adaptability of symbioses and their interactions with biogeochemical processes, as well as the potential large-scale impacts of these processes will be considered. Submissions describing interdisciplinary work and/or new analytical capabilities will be particularly welcome.

Orals (12 total, 7 hydrothermalism)

Sievert, S. M.; Taylor, C. D.; Schuster, S. C.; Le Bris, N.; Gulmann, L. K.; Molyneaux, S. J.; Richberg, K. P.; Sylva, S. P.; Wuchter, C.: An Integrated Approach To Study Chemolithoautotrophic Processes At Deep-Sea Hydrothermal Vents At 9؛N, East Pacific Rise.

Huber, H.; Gallenberger, M.; Friedrich-Jahn, U.; Berg, I. A.; Kockelkorn, D.; Eisenreich, W.; Fuchs, G.: A New Carbon Assimilation Cycle From The Hyperthermophilic Archaeum Ignicoccus Hospitalis: The Dicarboxylate/4-Hydroxybutyrate Pathway*

Brazelton, W. J.; Ludwig, K. A.; Kelley, D. S.; Baross, J. A.; Sogin, M. L.: Dynamics Of The Rare Biosphere In Carbonate Chimneys Spanning A Thousand Years Of The Lost City Hydrothermal Field*

Lott, C.; Weber, M. E.; Haeusler, S. M.; Nemecky, S.; Sevilgen, D. S.; Polerecky, L.; De Beer, D.; Dubilier, N.: Physiology And Ecology Of The Symbiosis Between Multiple Co-Occuring Bacteria And A Gutless Marine Worm (Oligochaeta)

Riou, V.; Dehairs, F.; Santos, R. S.; Colaço, A.; Bouillon, S.: Identification Of Plfa Biomarkers For Two Endosymbiotic Bacteria From A Mid-Atlantic Ridge Deep-Sea Hydrothermal Vent Mussel Using Stable Isotope Tracers

Boutet, I.; Tanguy, A.; Lallier, F. H.: Symbiosis In The Hydrothermal Vent Mussel Bathymodiolus Azoricus: Is Host Gene Expression Related To Its Methanotrophic & Sulfide-Oxidizing Bacterial Symbionts

Fisher, C. R.; Dattagupta, .: Sulfur Cycling By The Cold Seep Siboglinid Tubeworm, Lamellibrachia Luymesi

Le Bris, N.; Duperron, S.: Chemosynthetic Communities And Biogeochemical Energy Pathways Along The Mar: The Case Of Bathymodiolus Mussels

Wenzhoefer, F.; Gruenke, S.; Lichtschlag, A.; Felden, J.; De Beer, D.; Boetius, A.: Thiotrophic Bacterial Mats And Their Association With Methane Seeps - Is Energy And Fluid Flow Regulating Mat Development?

Govenar, B.; Shank, T. M.: Consumption Of Different Chemolithoautotrophic Bacteria By Co-Occurring Hydrothermal Vent Gastropods

Zeppilli, D.; Mea, M.; Magagnini, M.; Danovaro, R.: Benthic Biodiversity In Deep-Sea Mud Volcanoes Of The Central Mediterranean Sea

Hannides, A. K.; Smith, C. R.: Large Organic Fall Processing By Deep Sea Communities And The Generation Of Biogenic Reducing Habitats – A Modeling Effort

Posters (6 total, 3 hydrothermalism)

Jollivet, D.; Gagniere, N.; Mary, J.; Tanguy, A.; Boutet, I.; Hourdez, S.; Lallier, F. H.; Segurens, B.; Poch, O.; Lecompte, O.: Molecular Adaptation To High Temperatures In The Deep-Sea Vent Polychaete Alvinella Pompejana: Search For Adaptive Signatures From An Est Collection*

Hügler, M.; Struck, J. M.; Dubilier, N.; Sievert, S. M.: Unexpected Diversity Within The Rimicaris Exoculata Epibiotic Community - Insights Into Sulfur And Carbon Metabolism

Carlier, A., A.; Ritt, B.; Rodrigues, C. F.; Sarrazin, J.; Grall, J.; Clavier, J.: Food Web Structure Of Deep Mediterranean Cold Seeps Assessed By Multiple Stable Isotopes Analysis

Moalic, Y. M.; Desbruyeres, D.; Rozenfeld, A. F.; Bachraty, C.; Haond, S. A.: Network Analysis Applied To Deep-Sea Hydrothermal Vents World-Wide Biogeography

Laurent, M. C.; Gros, O.; Gaill, F.; Le Bris, N.: Sunken Wood Colonization In The Mangrove Swamp In Relation With Chemical Variations Of The Microenvironment

Zaikova, E.; Walsh, D. A.; Stilwell, C. P.; Mohn, W. W.; Tortell, P. D.; Hallam, S. J.: Microbial Community Structure In A Seasonally Anoxic Fjord: Saanich Inlet